Never heard great reviews of this brand, but the first test I did was very disappointing. I put in charge two products at a time (my smartphone and my wireless headset) and charge gave the impression of a product load at a time. In 2-3h, the helmet was in charge, while the smartphone had taken only 15% of battery, while normally it would have been fully charged. I will repeat 1 or 2 tests, but I really hesitate to return the product to get a refund.